<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
    <link rel="stylesheet/less" type="text/css" href="less.less" />
    <script src="//cdnjs.cloudflare.com/ajax/libs/less.js/3.10.3/less.min.js" ></script>
    <style>
        .cursor{
            cursor:pointer;
        }


    </style>
<body>
<div class="box">
   ABCD
    <div class="item">A</div>
</div>
<div class="btn">btn</div>
</body>

</html>